Oil in the Distributor?

[Henry Olivares de Lachica.]

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Here we go again folks, have any of you, have had the experience of finding motor oil in the distributor?
Is there a seal within the shaft?
I am planning to replace the Distributor assembly.
Thank you for your help.
I'll appreciate all you feedback.
Henry.
'91 200-20V q Wagon, '88 5000 q Wagon
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